A numerical study on drop formation of viscoelastic liquids using a nonlinear constitutive equation

In this paper, a numerical solution for viscoelastic drop formation from a nozzle into an ambient gas is presented. A volume of fluid (VOF) method is used to predict the formation and break-up process of viscoelastic drop. Here, Giesekus model is used as the constitutive equation. The major features...

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Bibliographic Details
Published in:Meccanica (Milan) 2017-12, Vol.52 (15), p.3593-3613
Main Authors: Komeili Birjandi, A., Norouzi, M., Kayhani, M. H.
Format: Article
Language:English
Subjects:
Automotive Engineering
Bond number
Civil Engineering
Classical Mechanics
Constitutive equations
Constitutive relationships
Constraining
Gravitation
Mathematical models
Mechanical Engineering
Physics
Physics and Astronomy
Viscoelastic liquids
Viscoelasticity
Viscosity ratio
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Summary:In this paper, a numerical solution for viscoelastic drop formation from a nozzle into an ambient gas is presented. A volume of fluid (VOF) method is used to predict the formation and break-up process of viscoelastic drop. Here, Giesekus model is used as the constitutive equation. The major features of the phenomenon, such as instantaneous drop length, limiting length of a drop at breakup, minimum drop radius and the volume of the primary drop is determined for a range of the parameter space spanned by the appropriate dimensionless groups. The results reveal that enhancing the mobility factor, Wiessenberg number, and viscosity ratio causes a noticeable decrease in limiting drop length and a small decrease on the primary drop volume. Also, the increasing of gravitational bond number and capillary number causes the limiting drop length increases while the primary drop volume is reduced.
ISSN:0025-6455
1572-9648
DOI:10.1007/s11012-017-0669-2